Mac users don't normally refer to their computers as pc's. So are you using mac or windows? If mac, which operating system version is it?
The LW playlist within iTunes is simply a playlist. The actual files will still be within the LW downld folder. So you can play them but that's all. Now if you're using mac osx then you can set it up to automatically import the songs. But not for windows.
For mac OSX see:
http://www.gnutellaforums.com/showth...threadid=36498
For windows see:
How to transfer music to my iPod (& iTunes)
For mac OS 8 or 9 see:
http://www.kapsi.de/files/itunes_old.html